I'll second the sun rims and XT hubs. A well built 32 spoke wheel with double butted spokes should do just fine.

I've put plenty of urban miles on my set-up:
Ritchey Vantage Pro 32 spoke rims, Shimano XTR hubs ('95 vintage), DT 14/15 gauge spokes and a variety of tires (currently IRC Metro 1.5's). I ride a rigid GT and spent most of the last few years at 180-200 lbs and this set-up has performed wonderfully.